The first Computational Semantics in Clinical Text (CSCT) workshop is a forum for the exploration and application of medically-oriented computational semantics. Clinical text has unique semantic and pragmatic characteristics -- prototypically describing a physician-patient encounter with entities and events in the real world. Furthermore, large-scale semantic resources (e.g., UMLS Metathesaurus) are well-developed and frequently used, text corpora are increasingly available (e.g., i2b2 NLP Challenge data), and the possibility of tangible medical benefit is of broad interest.